Name: Martensius ‭(‬named after Thomas Martens‭)‬.
Phonetic: Mar-ten-se-us.
Named By: D.‭ ‬S.‭ ‬Berman,‭ ‬H.‭ ‬C.‭ ‬Maddin,‭ ‬A.‭ ‬C.‭ ‬Henrici,‭ ‬S.‭ ‬S.‭ ‬Sumida,‭ ‬D.‭ ‬Scott‭ & ‬R.‭ ‬R.‭ ‬Reisz‭ ‬-‭ ‬2020.
Classification: Chordata,‭ ‬Synapsida,‭ ‬Caseasauria,‭ ‬Caseidae.
Species: M.‭ ‬bromackerensis‭ (‬type‭)‬.
Diet: Herbivore.
Size: Roughly estimated about‭ ‬73‭ ‬centimetres long.
Known locations: Germany,‭ ‬Bromacker quarry‭ ‬-‭ ‬Tambach formation.
Time period: Early Permian.
Fossil representation: Partially preserved and articulated skeletons of at‭ ‬least four individuals.

       Martensius is a genus of primitive caseidid synapsid that lived in Europe during the early Permian.‭ ‬Martensius is known from both adult and juvenile specimens,‭ ‬and these show a development in changing dietary habits as individual Martensius as they grew older.‭ ‬The teeth of Martensius are triangular like those of earlier more primitive relatives that were more insectivorous.‭ ‬But younger Martensius had more teeth in their lower jaw than adults,‭ ‬at least thirty-one to the adult twenty-five teeth.‭ ‬This would make the teeth dentition of juvenile Martensius more similarly to the genus Eocasea,‭ ‬a genus which is seen as more insectivorous than herbivorous.‭ ‬This has led to speculation that earlier in life Martensius were more carnivorous,‭ ‬perhaps requiring the extra protein from eating insects to promote body growth.‭ ‬Then in later life Martensius may have become more herbivorous,‭ ‬perhaps switching to a fully plant based diet.

Further reading
-‭ ‬New primitive caseid‭ (‬Synapsida,‭ ‬Caseasauria‭) ‬from the early Permian of Germany.‭ ‬-‭ ‬Annals of Carnegie Museum‭ ‬86‭(‬1‭)‬:43-75.‭ ‬-‭ ‬D.‭ ‬S.‭ ‬Berman,‭ ‬H.‭ ‬C.‭ ‬Maddin,‭ ‬A.‭ ‬C.‭ ‬Henrici,‭ ‬S.‭ ‬S.‭ ‬Sumida,‭ ‬D.‭ ‬Scott‭ & ‬R.‭ ‬R.‭ ‬Reisz‭ ‬-‭ ‬2020.


Random favourites